Day is frustrating to me, because it could've been so much better, so easily.
* No John Hurt, bring back Paul McGann (despite the former being my favorite British actor of all time).
* Retain the 90 minute runtime that Moffat intended, but...
* ... remove the opening "Doctor hanging from the TARDIS" in the beginning. What was up with that?
* Bring the old Doctors back to record new lines for the Save Gallifrey sequence.
* Bring William Russell as Ian back for two scenes, one with Clara at the beginning, one with the Doctor at the end, before his "I dream" bit. He's the original companion, dang it!
* Convince Eccleston, somehow, to do a regeneration scene for a minisode. I mean, come on!
As it is, it is better than Time, but I do enjoy the latter more because I didn't expect it to be as good as Day.
And to round up the trilogy, Name should've been a two-parter, plain and simple.